gem安装在MacOs Mojave中失败。有什么能帮我解决这个问题吗？我的红宝石版本是ruby 2.3.7p456。
➜ sudo gem install json -v '1.8.3'
current directory: /Library/Ruby/Gems/2.3.0/gems/json-1.8.3/ext/json/ext/generator
make "DESTDIR="
compiling generator.c
In file included from generator.c:1:
In file included from ./../fbuffer/fbuffer.h:5:
In file included from /Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.13.sdk/System/Library/Frameworks/Ruby.framework/Versions/2.3/usr/include/ruby-2.3.0/ruby.h:33:
/Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.13.sdk/System/Library/Frameworks/Ruby.framework/Versions/2.3/usr/include/ruby-2.3.0/ruby/ruby.h:24:10: fatal error: 'ruby/config.h' file not found
#include "ruby/config.h"
^~~~~~~~~~~~~~~
1 error generated.
make: *** [generator.o] Error 1
make failed, exit code 2
如果您运行Xcode 10 beta，可能会解决它
sudo xcode-select -s /Applications/Xcode-beta.app/Contents/Developer
我试图用自制软件安装fastlane时遇到了这个问题。前面提到的建议都没有帮助我。手动安装macOS_SDK_headers_for_macOS_10.14.pkg固定它。
sudo installer -pkg /Library/Developer/CommandLineTools/Packages/macOS_SDK_headers_for_macOS_10.14.pkg -target /
我遇到了同样的问题，由于包含“ruby / config.h”时出现故障，我无法安装原生扩展。
我相信这个问题的原因是因为我使用的是与Homebrew一起安装的ruby版本。在使用Homebrew升级到Ruby的新版本后，我从Homebrew中看到以下有用的消息：
ruby is keg-only, which means it was not symlinked into /usr/local,
because macOS already provides this software and installing another version in
parallel can cause all kinds of trouble.
If you need to have ruby first in your PATH run:
echo 'export PATH="/usr/local/opt/ruby/bin:$PATH"' >> ~/.bash_profile
For compilers to find ruby you may need to set:
export LDFLAGS="-L/usr/local/opt/ruby/lib"
export CPPFLAGS="-I/usr/local/opt/ruby/include"
For pkg-config to find ruby you may need to set:
export PKG_CONFIG_PATH="/usr/local/opt/ruby/lib/pkgconfig"
在我的〜/ .bash_profile中添加以下行为我解决了这个问题：
export LDFLAGS="-L/usr/local/opt/ruby/lib"
export CPPFLAGS="-I/usr/local/opt/ruby/include"